git: No module named git.mapping

Attempt to import git repo into brz branch gives:

$  brz pull -Derror -d financije-bzr/ financije-git/
brz: ERROR: ImportError: No module named git.mapping

Traceback (most recent call last):
  File "/home/gour/.local/lib/python2.7/site-packages/breezy/commands.py", line 1007, in exception_to_return_code
    return the_callable(*args, **kwargs)
  File "/home/gour/.local/lib/python2.7/site-packages/breezy/commands.py", line 1193, in run_bzr
    ret = run(*run_argv)
  File "/home/gour/.local/lib/python2.7/site-packages/breezy/commands.py", line 756, in run_argv_aliases
    return self.run(**all_cmd_args)
  File "/home/gour/.local/lib/python2.7/site-packages/breezy/commands.py", line 780, in run
    return self._operation.run_simple(*args, **kwargs)
  File "/home/gour/.local/lib/python2.7/site-packages/breezy/cleanup.py", line 136, in run_simple
    self.cleanups, self.func, *args, **kwargs)
  File "/home/gour/.local/lib/python2.7/site-packages/breezy/cleanup.py", line 165, in _do_with_cleanups
    result = func(*args, **kwargs)
  File "/home/gour/.local/lib/python2.7/site-packages/breezy/builtins.py", line 1310, in run
    possible_transports=possible_transports)
  File "/home/gour/.local/lib/python2.7/site-packages/breezy/branch.py", line 183, in open
    possible_transports=possible_transports)
  File "/home/gour/.bazaar/plugins/brz-git/dir.py", line 424, in open_branch
    repo = self.open_repository()
  File "/home/gour/.bazaar/plugins/brz-git/dir.py", line 479, in open_repository
    return self._gitrepository_class(self)
  File "/home/gour/.bazaar/plugins/brz-git/dir.py", line 333, in _get_gitrepository_class
    from .repository import LocalGitRepository
  File "/home/gour/.bazaar/plugins/brz-git/repository.py", line 42, in <module>
    from .commit import (
  File "/home/gour/.bazaar/plugins/brz-git/commit.py", line 50, in <module>
    from .mapping import (
  File "/home/gour/.bazaar/plugins/brz-git/mapping.py", line 518, in <module>
    default_mapping = mapping_registry.get_default()()
  File "/home/gour/.local/lib/python2.7/site-packages/breezy/foreign.py", line 104, in get_default
    return self.get(self._get_default_key())
  File "/home/gour/.local/lib/python2.7/site-packages/breezy/registry.py", line 177, in get
    return self._dict[self._get_key_or_default(key)].get_obj()
  File "/home/gour/.local/lib/python2.7/site-packages/breezy/registry.py", line 74, in get_obj
    self._obj = get_named_object(self._module_name, self._member_name)
  File "/home/gour/.local/lib/python2.7/site-packages/breezy/pyutils.py", line 51, in get_named_object
    obj = __import__(module_name, {}, {}, from_list)
ImportError: No module named git.mapping

I'm using trunk versions of both brz & brz-git.